Abstract
Two simple spectrophotometric methods are described for the determination of Diltiazen Hydrochloride (DZH) based on oxidising it with a known excess of ferric chloride [Fe(III)]or N-Bromosuccinimide (NBS) and estimating the reduced, Fe (II) or unreacted NBS with 1, 10-phenanthroline (PTL) or metolsulfanilamide (SA) in methods A or B respectively.
